Dewās vs Salem
Side-by-side air quality comparison between Dewās and Salem.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dewās averaged an AQI of 98 while Salem averaged 68 — a 30-point (44%) gap, with Dewās the more polluted and Salem the cleaner of the two. On 359 days when both cities reported, Salem was cleaner on 266 of them; the average daily gap was 48 AQI points.
Seasonality & days
Dewās peaks in December, while Salem peaks in April. Dewās logged 0% Severe days and 47.7% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Dewās 101 days, Salem 17 days.
Year-over-year progress
Dewās has improved by 48 AQI points (32.9%) from 2017 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Dewās reached AQI 327 at Bhopal Chauraha (MPPCB) on 2023-07-01; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Dewās spans 1 CPCB stations with a 0-point spread (min 106, max 106); Salem spans 1 stations with a 0-point spread (min 73, max 73).